POD在大跨度屋面结构风工程中的应用

he proper orthogonal decomposition (POD) is a kind of analysis of wind pressure field of large-span roof in the frequency domain, wind pressure filed of structural surface can be decomposed into a linear combination with principal coordinate depended time and intrinsic modes depended spatial covariance matrix. The main advantage of POD is that the original wind pressure filed can be accurately reconstructed and predicted with a limited number of modes, because these modes contains most of the pulse energy of the structure. The proper orthogonal decomposition method is applied widely in many fields. This paper focuses on applications of POD in wind engineering field for large-span roof structures.